all: 1_echo_server 2_echo_server
1_echo_server: 1_echo_server.cc
	g++ -o $@ $^ -std=c++17
2_echo_server: 2_echo_server.cc
	g++ -o $@ $^ -std=c++17

.PHONY:clean
clean: 
	rm 1_echo_server 2_echo_server